import { constantRoutes } from '@/router'
import {getMenuList} from '@/api/user'
import Layout from '@/layout'
/**
 * Use meta.role to determine if the current user has permission
 * @param roles
 * @param route
 */
function hasPermission(roles, route) {
  if (route.meta && route.meta.roles) {
    return roles.some(role => route.meta.roles.includes(role))
  } else {
    return true
  }
}

/**
 * Filter asynchronous routing tables by recursion
 * @param routes asyncRoutes
 * @param roles
 */
export function filterAsyncRoutes(routes, roles) {
  const res = []

  routes.forEach(route => {
    const tmp = { ...route }
    if (hasPermission(roles, tmp)) {
        //动态找到页面路径
        const component = tmp.component;
        if(route.component){
            //判断是否是一级菜单
            if(component == 'Layout'){
                tmp.component = Layout;
            }else{
                tmp.component = (resolve) => require([`@/views${component}`],resolve)
            }
        }
      if (tmp.children) {
        tmp.children = filterAsyncRoutes(tmp.children, roles)
      }
      res.push(tmp)
    }
  })

  return res
}

const state = {
  routes: [],
  addRoutes: []
}

const mutations = {
  SET_ROUTES: (state, routes) => {
    state.addRoutes = routes
    state.routes = constantRoutes.concat(routes)
  }
}

const actions = {
  //获取路由数据
  generateRoutes({ commit }, roles) {
    return new Promise((resolve,reject)=>{
      //存的是有权限的路由，是一个数组
      getMenuList().then(res => {
        //console.log('返回菜单')
        //console.log(res)
        let accessedRoutes;
        if(res.code == 200){
          accessedRoutes = filterAsyncRoutes(res.data, roles)
        }
        commit('SET_ROUTES', accessedRoutes)
        resolve(accessedRoutes)
      }).catch(error=>{
        reject(error)
      })
    })
  }

//   generateRoutes({ commit }, roles) {
//     return new Promise(resolve => {
//       let accessedRoutes
//       if (roles.includes('admin')) {
//         accessedRoutes = asyncRoutes || []
//       } else {
//         accessedRoutes = filterAsyncRoutes(asyncRoutes, roles)
//       }
//       commit('SET_ROUTES', accessedRoutes)
//       resolve(accessedRoutes)
//     })
//   }

}

export default {
  namespaced: true,
  state,
  mutations,
  actions
}
